Hey Bob,
I know this sounds like sour grapes - just thinking of a spun aluminum reflector that didn't work well.
It's not sour grapes at all, but a realistic understanding of how a real T-90 is made. I haven't ever seen one in person, so I really don't know what the reflector is shaped like.
After thinking about it for a day or two, I'll probably start out with the conventional multi-lnbf approach as the links in Anole's reply above and see how many degrees I can get with that.
I would just like to maximise the use of the dish in the best way possible.
I don't mind putting up more dishes. I have two Primestar 84Es in the warehouse now waiting for a spot to be used.
If I can get 20 degrees either side of center from 91W as my center with great signal quality, that would be pretty awesome for a single dish, especially if I can put an LNBf for every satellite in that 40 degree range.
That would be an LNBf for 72, 74, 79, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 107.3, 111.1W, that's a lot of LNBfs one one dish. That's assuming of course that the size of the dish will allow for 2 degree spacing of the LNBFs.
I could then fill in the rest with smaller multi-lnb dishes.
I read here somewhere that someone was hitting 119W, 123W, 129W, and 148W on an 84e with multi-lnbfs. I already have a dish with 123 and 129 on it. Maybe I'll just add to that one for the far West.
I anticipate having a lot of fun building this in the warehouse and putting it up this spring.